Discover the history and evolution of military forts and fortifications, from ancient earthen hillforts to massive 20th-century concrete bunkers. In a 2-hour special, we examine various historical defenses, including France's Maginot Line, a defensive string of forts with enfilading firepower; the Atlantic Wall, 3,000 miles of shore fortifications built by Germany in WWII; and the North American Aerospace Defense Command (NORAD).



Tech Specs :

Video Codec: x264 CABAC High@L4
Video Bitrate: 2 550 kb/s
Video Resolution: 1418x1080
Display Aspect Ratio: 4:3
Frames Per Second: 23.976 fps
Audio Codec: AAC (LC)
Audio Bitrate: 128 kb/s VBR 44.1 kHz
Audio Streams:  2
Audio Languages: english
RunTime Per Part:   1 h 25 min 
Number Of Parts: 1
Part Size: 1.60 GB 
Source: WEB DL
Encoded by: DocFreak08

Release notes:
Merged subtitles